j2me 图片处理大全（有自己写的 有山寨别人的 还有照搬的别人的 ）

下来总结了一下图片的特效处理

 

图片的渐变效果

import java.io.IOException; import javax.microedition.lcdui.Canvas; import javax.microedition.lcdui.Graphics; import javax.microedition.lcdui.Image; //ShadowCanvas.java /** * @author boolean liuhao137310@163.com: * @version 创建时间：2009-2-7 下午02:01:27 * @TODO 图片的渐变效果 在第一张图片的基础上渐变出第二张图片 */ class ShadowCanvas extends Canvas implements Runnable { int w, h; /**原始图片*/ Image img2; /**渐变图片*/ Image srcImage; // 原始图片的像素数组 int[] srcRgbImage; // 渐变图片的像素数组 int[] shadowRgbImage; int imgWidth, imgHeight; int count; /**原始图片只画一次即可 此变量记录是否是第一次画原始图片*/ private boolean first = true; public ShadowCanvas() { w = this.getWidth(); h = this.getHeight(); try { srcImage = Image.createImage("/logoBg.png"); img2 = Image.createImage("/test_bg.png"); } catch (IOException e) { e.printStackTrace(); } imgWidth = srcImage.getWidth(); imgHeight = srcImage.getHeight(); // 制造原始图片的像素数组，用一个int来代表每一个像素,按位表示方式是:0xAARRGGBB srcRgbImage = new int[imgWidth * imgHeight]; // 获取原始图片的所有像素，参见MIDP APPI文档 srcImage.getRGB(srcRgbImage, 0, imgWidth, 0, 0, imgWidth, imgHeight); shadowRgbImage = new int[srcRgbImage.length]; System.arraycopy(srcRgbImage, 0, shadowRgbImage, 0, shadowRgbImage.length); // 渐变图片的所有像素一开始都是全透明的 for (int i = 0; i < shadowRgbImage.length; i++) { shadowRgbImage[i] &= 0x00ffffff; } new Thread(this).start(); } public void paint(Graphics g) { // g.setColor(0, 0, 0); // g.fillRect(0, 0, w, h); if(first){ g.drawImage(img2, 0, 0, 0); first = false; } // 绘制渐变图片 g.drawRGB(shadowRgbImage, 0, imgWidth, (w - imgWidth) / 2, (h - imgHeight) / 2, imgWidth, imgHeight, true); // g.setColor(0, 255, 0); // g.drawString("count=" + count, w / 2, 30, Graphics.HCENTER // | Graphics.TOP); } public void run() { while (true) { boolean changed = false; // 改变渐变图片的每一个像素 for (int i = 0; i < shadowRgbImage.length; i++) { // 获取渐变图片的某一像素的alpha值 int alpha = (shadowRgbImage[i] & 0xff000000) >>> 24; // 原始图片的对应像素的alpha值 int oldAlpha = (srcRgbImage[i] & 0xff000000) >>> 24; if (alpha < oldAlpha) { // alpha值++ 写的太精妙了 把移位用到了极致 shadowRgbImage[i] = ((alpha + 1) << 24) | (shadowRgbImage[i] & 0x00ffffff); changed = true; } } try { Thread.sleep(10); } catch (InterruptedException e) { e.printStackTrace(); } count ++; repaint(); // 当所有像素的alpha值都达到原始值后,线程运行结束 if (!changed) { System.out.println("over"); break; } } } }

 

下边这个类中包含了很多 这是照搬别人的 尊重原创， 在这写下来 主要是为了日后用的时候方便

 

 

 ImageUtil /* * ImageUtil.java * * Created on 2008年1月11日, 上午9:26 * */ /** * * @author alajl */ import javax.microedition.lcdui.*; import javax.microedition.lcdui.game.Sprite; public class ImageUtil { public static final int TURN_LEFT = 1; public static final int TURN_RIGHT = 2; /* *获取图片RGB数据，并返回大小为width*height大小的一维数组 */ public int[] getPixels(Image src) { int w = src.getWidth(); int h = src.getHeight(); int[] pixels = new int[w * h]; src.getRGB(pixels, 0, w, 0, 0, w, h); return pixels; } /* *将pixels[]里的数据，生成一张图片，图片宽为w，高为h */ public Image drawPixels(int[] pixels, int w, int h) { Image image = Image.createRGBImage(pixels, w, h, true); pixels = null; return image; } /* *调整图片大小 *destW 调整后的宽，destH调整后的高 */ public Image effect_resizeImage(Image src, int destW, int destH) { int srcW = src.getWidth(); int srcH = src.getHeight(); int[] destPixels = new int[destW * destH]; int[] srcPixels = getPixels(src); for (int destY = 0; destY < destH; ++destY) { for (int destX = 0; destX < destW; ++destX) { int srcX = (destX * srcW) / destW; int srcY = (destY * srcH) / destH; destPixels[destX + destY * destW] = srcPixels[srcX + srcY * srcW]; } } return drawPixels(destPixels, destW, destH); } /* * 调整图片亮度与对比度。 contrast 对比度，light 亮度 */ public Image effect_light_contrast(Image src,double contrast,int light) { int srcW = src.getWidth(); int srcH = src.getHeight(); int[] srcPixels = getPixels(src); int r = 0; int g = 0; int b = 0; int a = 0; int argb; //公式y =ax+b a为对比度，b为亮度 //int para_b = light - 127 * (light - 1); for (int i = 0; i < srcH; i++) { for(int ii=0;ii<srcW;ii++) { argb = srcPixels[i*srcW+ii]; a = ((argb & 0xff000000) >> 24); // alpha channel r =((argb & 0x00ff0000) >> 16); // red channel g =((argb & 0x0000ff00) >> 8); // green channel b =(argb & 0x000000ff); // blue channel r =(int)( r*contrast+light); g =(int)( g*contrast+light); b =(int)( b*contrast+light); /*r =(int)((r -127 ) * contrast + 127+para_b); g =(int)((g -127 ) * contrast + 127+para_b); b =(int)((b -127 ) * contrast + 127+para_b);*/ if(r>255) r = 255; else if(r<0) r=0; if(g>255) g = 255; else if(g<0) g=0; if(b>255) b = 255; else if(b<0) b=0; srcPixels[i*srcW+ii] = ((a << 24) | (r << 16) | (g << 8) | b); } } return drawPixels(srcPixels, srcW, srcH); } /* * 图片镜像特效 */ public Image effect_mirror(Image src) { int srcW = src.getWidth(); int srcH = src.getHeight(); int[] srcPixels = getPixels(src); int len; int temp; for (int i = 0; i < srcH; i++) { len = (i+1)*srcW; for(int ii=0;ii<srcW/2;ii++) { temp=srcPixels[i*srcW+ii]; srcPixels[i*srcW+ii]=srcPixels[len-1-ii]; srcPixels[len-1-ii]=temp; } } return drawPixels(srcPixels, srcW, srcH); } /* * 图片剪切，cut_xpos，cut_ypos 切割框的起始位置坐标，cut_width，cut_height 切割框的宽与高 */ public Image effect_cut(Image src,int cut_xpos,int cut_ypos,int cut_width,int cut_height) { int srcW = src.getWidth(); int srcH = src.getHeight(); int[] srcPixels = getPixels(src); int[] desPixels = new int[cut_width*cut_height]; int argb; int num = 0; for (int i = 0; i < srcH; i++) { if(i >= cut_ypos&&i<cut_height+cut_ypos) { for(int ii=0;ii<srcW;ii++) { if(ii>=cut_xpos && ii<cut_width+cut_xpos) { desPixels[num] = srcPixels[i*srcW+ii]; num++; } } } } return drawPixels(desPixels, cut_width, cut_height); } /* * 图片叠加，将src和image合成一张图片，x_pos，y_pos一般为0,0,也可以为自定义值 */ public Image effect_image_add_image(Image src,Image image,int x_pos,int y_pos) { Image temp = Image.createImage(src.getWidth(),src.getHeight()); Graphics g = temp.getGraphics(); //g.drawImage(src,x_pos,y_pos,Graphics.LEFT|Graphics.TOP); //g.drawImage(image,x_pos,y_pos,Graphics.LEFT|Graphics.TOP);*/ int alpha = 168; int []srcRgbdata = new int[src.getWidth()*src.getHeight()]; int []desRgbdata = new int[image.getWidth()*image.getHeight()]; src.getRGB(srcRgbdata,0,src.getWidth(),0,0,src.getWidth(),src.getHeight()); image.getRGB(desRgbdata,0,image.getWidth(),0,0,image.getWidth(),image.getHeight()); g.drawRGB(getTransImg(alpha,srcRgbdata,desRgbdata),0,src.getWidth(),0,0,src.getWidth(),src.getHeight(),false); src=null; image=null; return temp; } /* * 图片上添加字符 */ public Image effect_image_add_str(Image src,String str,int x_pos,int y_pos) { Image temp = Image.createImage(src.getWidth(),src.getHeight()); Graphics g = temp.getGraphics(); g.drawImage(src,0,0,Graphics.LEFT|Graphics.TOP); g.setColor(0x000000); g.drawString(str,x_pos,y_pos,Graphics.LEFT|Graphics.TOP); return temp; } /* * 图片特效负片 */ public Image effect_negative(Image src) { int srcW = src.getWidth(); int srcH = src.getHeight(); int[] srcPixels = getPixels(src); int r = 0; int g = 0; int b = 0; int a = 0; int argb; for (int i = 0; i < srcH; i++) { for(int ii=0;ii<srcW;ii++) { argb = srcPixels[i*srcW+ii]; a = ((argb & 0xff000000) >> 24); // alpha channel r =255-((argb & 0x00ff0000) >> 16); // red channel g =255-((argb & 0x0000ff00) >> 8); // green channel b =255-(argb & 0x000000ff); // blue channel srcPixels[i*srcW+ii] = ((a << 24) | (r << 16) | (g << 8) | b); } } return drawPixels(srcPixels, srcW, srcH); } /* * 图片特效黑白 */ public Image effect_black_white(Image src) { int srcW = src.getWidth(); int srcH = src.getHeight(); int[] srcPixels = getPixels(src); int r = 0; int g = 0; int b = 0; int a = 0; int argb; int temp; for (int i = 0; i < srcH; i++) { for(int ii=0;ii<srcW;ii++) { argb = srcPixels[i*srcW+ii]; a = ((argb & 0xff000000) >> 24); // alpha channel r = ((argb & 0x00ff0000) >> 16); // red channel g = ((argb & 0x0000ff00) >> 8); // green channel b = (argb & 0x000000ff); // blue channel temp = (int)(.299*(double)r+.587*(double)g+.114*(double)b); r = temp; g = temp; b = temp; srcPixels[i*srcW+ii] = ((a << 24) | (r << 16) | (g << 8) | b); } } return drawPixels(srcPixels, srcW, srcH); } /* * 图片特效粉笔画 */ public Image effect_crayon(Image src) { int srcW = src.getWidth(); int srcH = src.getHeight(); int[] srcPixels = getPixels(src); int r = 0; int g = 0; int b = 0; int a = 0; int argb; int r1 = 0; int g1 = 0; int b1 = 0; int a1 = 0; int r2 = 0; int g2 = 0; int b2 = 0; int a2 = 0; for (int i = 0; i < srcH; i++) { for(int ii=0;ii<srcW;ii++) { argb = srcPixels[i*srcW+ii]; a = ((argb & 0xff000000) >> 24); // alpha channel r = ((argb & 0x00ff0000) >> 16); // red channel g = ((argb & 0x0000ff00) >> 8); // green channel b = (argb & 0x000000ff); // blue channel if(i+1 == srcH) { r1= 0; g1= 0; b1=0; } else { argb = srcPixels[(i+1)*srcW+ii]; //a1 = ((argb & 0xff000000) >> 24); // alpha channel r1 = ((argb & 0x00ff0000) >> 16); // red channel g1 = ((argb & 0x0000ff00) >> 8); // green channel b1 = (argb & 0x000000ff); // blue channel } if(ii+1 == srcW){ r2= 0; g2= 0; b2=0; } else { argb = srcPixels[i*srcW+ii+1]; r2 = ((argb & 0x00ff0000) >> 16); // red channel g2 = ((argb & 0x0000ff00) >> 8); // green channel b2 = (argb & 0x000000ff); // blue channel } // rr1=(r1-r2)^2 rr2=(r1-r3)^2 r = (int)Math.sqrt((double)(2*(r-r1)*(r-r1)+(r-r2)*(r-r2))); g = (int)Math.sqrt((double)(2*(g-g1)*(g-g1)+(g-g2)*(g-g2))); b = (int)Math.sqrt((double)(2*(b-b1)*(b-b1)+(b-b2)*(b-b2))); r =255-r; // red channel g =255-g; // green channel b =255-b; // blue channel srcPixels[i*srcW+ii] = ((a << 24) | (r << 16) | (g << 8) | b); } } return drawPixels(srcPixels, srcW, srcH); } /* * 图片特效蒙版 */ public Image effect_hoodwink(Image src) { int srcW = src.getWidth(); int srcH = src.getHeight(); int[] srcPixels = getPixels(src); int r = 0; int g = 0; int b = 0; int a = 0; int argb; for (int i = 0; i < srcH; i++) { for(int ii=0;ii<srcW;ii++) { argb = srcPixels[i*srcW+ii]; a = ((argb & 0xff000000) >> 24); // alpha channel r = ((argb & 0x00ff0000) >> 16); // red channel g = ((argb & 0x0000ff00) >> 8); // green channel b = (argb & 0x000000ff); // blue channel r = (int)(.299*(double)r); g = (int)(.587*(double)g); b = (int)(.114*(double)b); srcPixels[i*srcW+ii] = ((a << 24) | (r << 16) | (g << 8) | b); } } return drawPixels(srcPixels, srcW, srcH); } private int[] getTransImg(int alpha,int[] srcRgbdata,int[] desRgbdata) { int [] tempRgbData = new int[desRgbdata.length]; int sr ; int sg ; int sb ; int dr ; int dg ; int db ; int tr ; int tg ; int tb ; for(int i=0;i<desRgbdata.length;i++) { sr = (srcRgbdata[i]&0xff0000)>>16; sg = (srcRgbdata[i]&0xff00)>>8; sb = srcRgbdata[i]&0xff; dr = (desRgbdata[i]&0xff0000)>>16; dg = (desRgbdata[i]&0xff00)>>8; db = desRgbdata[i]&0xff; tr = (sr*alpha + dr*(255-alpha))/255; tg = (sg*alpha + dg*(255-alpha))/255; tb = (sb*alpha + db*(255-alpha))/255; tempRgbData[i] = (tr<<16)|(tg<<8)|tb; } return tempRgbData; } /* * 图片特旋转 */ public Image effect_rotate(Image src,int direction) { Sprite sprite = new Sprite(src); switch(direction) { case 1: sprite.setTransform(sprite.TRANS_ROT270); break; case 2: sprite.setTransform(sprite.TRANS_ROT90); break; } Image temp = Image.createImage(src.getHeight(),src.getWidth()); Graphics g = temp.getGraphics(); sprite.setPosition(0,0); sprite.paint(g); return temp; } /* * 图片特霓虹灯 */ public Image effect_neonLight(Image src) { int srcW = src.getWidth(); int srcH = src.getHeight(); int[] srcPixels = getPixels(src); int r = 0; int g = 0; int b = 0; int a = 0; int argb; int r1 = 0; int g1 = 0; int b1 = 0; int a1 = 0; int r2 = 0; int g2 = 0; int b2 = 0; int a2 = 0; for (int i = 0; i < srcH; i++) { for(int ii=0;ii<srcW;ii++) { argb = srcPixels[i*srcW+ii]; a = ((argb & 0xff000000) >> 24); // alpha channel r = ((argb & 0x00ff0000) >> 16); // red channel g = ((argb & 0x0000ff00) >> 8); // green channel b = (argb & 0x000000ff); // blue channel if(i+1 == srcH) { r1= 0; g1= 0; b1=0; } else { argb = srcPixels[(i+1)*srcW+ii]; //a1 = ((argb & 0xff000000) >> 24); // alpha channel r1 = ((argb & 0x00ff0000) >> 16); // red channel g1 = ((argb & 0x0000ff00) >> 8); // green channel b1 = (argb & 0x000000ff); // blue channel } if(ii+1 == srcW){ r2= 0; g2= 0; b2=0; } else { argb = srcPixels[i*srcW+ii+1]; r2 = ((argb & 0x00ff0000) >> 16); // red channel g2 = ((argb & 0x0000ff00) >> 8); // green channel b2 = (argb & 0x000000ff); // blue channel } // rr1=(r1-r2)^2 rr2=(r1-r3)^2 r = (int)Math.sqrt((double)(2*(r-r1)*(r-r1)+(r-r2)*(r-r2))); g = (int)Math.sqrt((double)(2*(g-g1)*(g-g1)+(g-g2)*(g-g2))); b = (int)Math.sqrt((double)(2*(b-b1)*(b-b1)+(b-b2)*(b-b2))); srcPixels[i*srcW+ii] = ((a << 24) | (r << 16) | (g << 8) | b); } } return drawPixels(srcPixels, srcW, srcH); } }

 

图片的透明处理 其实和第一个渐变效果差不多 只不多这个函数中多了一个透明度参数 使用起来更加方便

/** * * @param img * 原始图片 * @param transparent * 透明度 0-255之间 * @return 处理透明度后的图片 */ public static Image effect_transparent(Image img, int transparent) { if (transparent < 0 || transparent > 255) return img; int srcW = img.getWidth(); int srcH = img.getHeight(); int[] srcPixels = getPixels(img); //函数功能 讲图片数据存入指定数组 for (int i = 0; i < srcPixels.length; i++) { int a = srcPixels[i] >> 24; srcPixels[i] = (transparent << 24) | (srcPixels[i] & 0x00ffffff); } return drawPixels(srcPixels, srcW, srcH); //将数组转化为图片 }

 

 

还有一个任意角度翻转函数 网友相赠 :

/** *@param imgSource 源图像 *@param cx 旋转点相对于源图像坐上角横坐标 *@param cy 旋转点相对于源图像坐上角纵坐标 *@param theta 图像逆时针旋转的角度 *@return 旋转后的图像 */ public Image rotate(Image imgSource, int cx, int cy, double theta) { if (Math.abs(theta % 360) < 1) return imgSource; //角度很小时直接返回 int w1 = imgSource.getWidth(); //原始图像的高度和宽度 int h1 = imgSource.getHeight(); int[] srcMap = new int[w1 * h1]; imgSource.getRGB(srcMap, 0, w1, 0, 0, w1, h1); //获取原始图像的像素信息 int dx = cx > w1 / 2 ? cx : w1 - cx; //计算旋转半径 int dy = cy > h1 / 2 ? cy : h1 - cy; double dr = Math.sqrt(dx * dx + dy * dy); int wh2 = (int) (2 * dr + 1); //旋转后新图像为正方形，其边长+1是为了防止数组越界 int[] destMap = new int[wh2 * wh2]; //存放新图像象素的数组 double destX, destY; double radian = theta * Math.PI / 180; //计算角度计算对应的弧度值 for (int i = 0; i < w1; i++) { for (int j = 0; j < h1; j++) { if (srcMap[j * w1 + i] >> 24 != 0) { //对非透明点才进行处理 // 得到当前点经旋转后相对于新图像左上角的坐标 destX = dr + (i - cx) * Math.cos(radian) + (j - cy) * Math.sin(radian); destY = dr + (j - cy) * Math.cos(radian) - (i - cx) * Math.sin(radian); //从源图像中往新图像中填充像素 destMap[(int) destY * wh2 + (int) destX] = srcMap[j * w1 + i]; } } } return Image.createRGBImage(destMap, wh2, wh2, true); //返回旋转后的图像 }